Toyotomi GAN-A135GVR-T3 Service Manual page 61

Check if the controller connection
wire inside indoor and outdoor
electric box is loose
If the connection wire
N
Connectwire of indoor
and outdoor unit
according to
circuit diagram
Check communication
circuit of outdoor unit
N
If the malfunction
is removed ?
Y
If the unit is operating
normally before malfunction
Y
is normal?
Y
Y
Problem of
communication
circuit
N
Replace indoor
mainboard
Start
Y
Replace outdoor
mainboard (AP1)
If the
malfunction is
removed?
Y
End
N
Check connection wire
of indoor and outdoor
unit with circuit diagram
Connection
correct?
N
N
Connect wire of indoor
and outdoor unit
according to
circuit diagram
If the malfunction
is removed?
Y